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<html lang="en">
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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style></style>
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    <div id="app">
      <button @click="count++">+</button>
      <button @click="count--">-</button>
      <span>{{count}}</span>
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    <script src="../../vue.js"></script>

    <script>
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        el: "#app",
        data: {
          count: 0,
        },
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</html>
